#coding=UTF-8
from flask import Flask, request, current_app
from config import Config
from flask_sqlalchemy import SQLAlchemy
from flask_migrate import Migrate
from flask_login import LoginManager
from flask_mail import Mail
from flask_babel import Babel
from flask_moment import Moment
from logging.handlers import SMTPHandler,RotatingFileHandler
from flask_bootstrap import Bootstrap
from elasticsearch import Elasticsearch
import os
import logging
from config import Config



# db represents the database
db = SQLAlchemy()
migrate = Migrate()
login = LoginManager()
login.login_view = 'auth.login'
login.login_message = 'Please log in to access this page.'
#创建Mail类的对象
mail = Mail()
#bootstrap初始化
bootstrap = Bootstrap()
# 
moment = Moment()
babel = Babel()

def create_app(config_class = Config):
	app = Flask(__name__)
	app.config.from_object(config_class)

	db.init_app(app)
	migrate.init_app(app,db)

	login.init_app(app)

	mail.init_app(app)

	bootstrap.init_app(app)

	moment.init_app(app)

	babel.init_app(app)

	app.elasticsearch = Elasticsearch([app.config['ELASTICSEARCH_URL']]) \
						if app.config['ELASTICSEARCH_URL']  else None
	from app.errors import bp as errors_bp
	app.register_blueprint(errors_bp)

	from app.auth import bp as auth_bp
	app.register_blueprint(auth_bp,url_prefix = '/auth')

	from app.main import bp as main_bp
	app.register_blueprint(main_bp)


	if not app.debug and not app.testing:
		'''
		if app.config['MAIL_SERVER']:
			auth = None
			if app.config['MAIL_USERNAME'] or app.config['MAIL_PASSWORD']:
				auth = (app.config['MAIL_USERNAME'],app.config['MAIL_PASSWORD'])
			secure = None
			if app.config['MAIL_USE_TLS']:
				secure = ()

			mail_hander = SMTPHandler(
				mailhost = (app.config['MAIL_SERVER'],app.config['MAIL_PORT']),
				formaddr = 'no-reply@' + app.config['MAIL_SERVER'],
				toaddr = app.config['ADMINS'],
				subject = 'Microblog Failure',
				credentials = auth,
				secure = secure
				)
			mail_hander.setLevel(logging.ERROR)
			app.logger.addHandler(mail_handler)
		'''
		if not os.path.exists('logs'):
			os.mkdir('logs')
		file_handler = RotatingFileHandler('logs/microblog.log',maxBytes = 10240,backupCount = 10)

		file_handler.setFormatter(logging.Formatter('%(asctime)s %(levelname)s: %(message)s [in %(pathname)s:%(lineno)d]'))

		file_handler.setLevel(logging.INFO)
		app.logger.addHandler(file_handler)
		app.logger.setLevel(logging.INFO)
		app.logger.info('Microblog startup')
	return app

from app import  models
